The head of a $40 million Manhattan translation company is trying to drive out the company’s cofounder through acts of humiliation as well as calling the man’s wife — who runs a Holocaust survivors network — a Nazi sympathizer, a new lawsuit charges.

Ivan Ciment is suing his own companies, SpanTran and Morningside Evaluations, over CEO Josh Eisen’s bizarre antics, which he says are intended to force him out.

A Feb. 19 email sent to Ciment’s wife at 4:20 a.m. starts, “Your autistic husband is stealing from us,” and concludes, “May you bathe in the warm semen of Mengele,” referring to the notorious Nazi doctor Josef Mengele.

The email was sent around the time that Eisen allegedly smashed Oreo cookies onto Ciment’s head and then spilled water on him in front of employees at their Herald Square office.

Ciment is asking a judge to declare that he has a right to remain at the firms as a 34 percent owner.

Eisen, who was once roommates with Ciment, controls 51 percent while employees own the rest.

There are pending criminal charges against Eisen for stalking and harassment.